Junior Product Security Engineer

Trainline

Product Security Engineer ensuring security in cloud-native product development at Trainline. Collaborating with cross-functional teams to improve security practices and safeguard digital channels.

Posted 4/27/2026full-timeLondon • 🇬🇧 United KingdomJunior💰 £45,000 - £50,000 per yearWebsite

Tech Stack

Tools & technologies

Distributed SystemsJavaScriptPythonSDLC

About the role

Key responsibilities & impact

Support the integration of security practices across the product development lifecycle
Work with teams to promote secure-by-default and a shift-left approach to security
Help integrate security checks into CI/CD workflows
Assist in triaging and analysing findings from automated tooling
Review and triage incoming security issues from scans and bug reports
Record, prioritise and help track remediation with developers and platform teams
Participate in threat modelling sessions and documentation efforts
Help promote secure coding principles across teams
Assist with aligning product security practices with relevant security frameworks and standards

Requirements

What you’ll need

Relevant education, training, or practical experience in cyber/information security or software engineering/development
Understanding of common security risks affecting applications, APIs, and distributed systems
Familiarity with secure coding principles, the software development lifecycle (SDLC) and threat modelling concepts
Exposure to security testing approaches such as SAST, DAST, or dependency scanning
Basic programming or scripting ability (e.g. Python, JavaScript, or similar)
Interest in building or improving security tooling, automation, or developer workflows
Strong analytical and problem-solving skills
Ability to collaborate effectively with engineers and communicate security concerns clearly

Benefits

Comp & perks

Private healthcare & dental insurance
Generous work from abroad policy
2-for-1 share purchase plans
EV Scheme to further reduce carbon emissions
Extra festive time off
Excellent family-friendly benefits
Clear career paths
Transparent pay bands
Personal learning budgets
Regular learning days

ATS Keywords

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Hard Skills & Tools

cybersecurityinformation securitysecure codingsoftware development lifecyclethreat modellingSASTDASTdependency scanningPythonJavaScript

Soft Skills

analytical skillsproblem-solving skillscollaborationcommunication